Скачать или смотреть Types Of VISION Chart

#VISION_CHART
#SNELLEN'S_CHART
#LOGMAR_CHART
#LEA_SYMBOL
#TUMBLING_E_CHART
#LANDOLT_C_CHART
#OPTOMETRY
#OPHTHALMOLOGY
Visual acuity is a measure of the spatial resolution of the eye or in other words,an estimation of its ability to discriminate between two points.
So to measure visual acuity we need charts to determine and to record the vision.
Snellen chart : Named after the dutch ophthalmologist Hermann Snellen who developed the chart in 1862.
Basis of snellens test types in that two distant points can be visible as seperate only when they subtend an angle of 1 minute at the nodal point.
Landolt test chart: Similar to snellens except that instead of letters the broken circles are used.
These are all some of the distant visual recording charts,there are also same version of near distance measuring charts are also available.
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Abhaya Group of Institutions.